The arms are different for both sides which is why I am having trouble deciding if I want to install the pass side. It has to sit up higher to be viewed from driver's side. I think it will look funny if looking at truck from an agle where both sides could be seen at same time. The washer probably has a foot pump on the floor. If you e-mail me, I have a couple of e-mail addresses of people that sell washer parts but be prepared, they are not cheap.